Nivus OCM PRO CF, Инструкция по эксплуатации

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Instruction manual
OCM Pro CF
®
OCM Pro CF - Rev. 09 as of 07.06.2016 page 85
Important Note
Programming subdivided profiles requires comprehensive knowledge and
experience in operating the OCM Pro.
To avoid faulty programming or if in doubt this procedure should be performed
by NIVUS service personnel or expert companies authorised by NIVUS.
Sludge level
The sludge level set is considered during calculation as non-moving sub-area
on the channel bottom and will be subtracted from the wetted hydraulic total
area prior to performing flow calculation.
Low-flow volume Q
min
This parameter serves to suppress lowest movements or apparent volumes
arising. Used mainly to measure overflow volumes in constructions which are
permanently flooded by receiving water.
Q
min
: measurement values lower than this one will be set to >0<. Only positive
values are allowed to be set. These values are going to be considered as
absolute values and therefore have positive as well as negative effects.
V
min
: low-flow volumes in applications with large profiles and filling levels can be
suppressed by means of this parameter. Lowest velocity fluctuations within
longer periods of time may cause apparently large volume fluctuations which
cannot be gated by using the value of Q
min
.
Flow velocities below this value will be set to „0“ which will set the calculated
volume to „0“ as well.
Only positive values can be set. These values are going to be considered as
absolute values and therefore affect positive as well as negative velocities.
Both setting options of low-flow suppression have an
>
OR< relation between
each other.
Fig. 9-29 Selection low-flow volumes
Note
The suppression of low-flow volumes is no offset but a limit value!